Warmhaus EWA 2525C Supplement

CONDENSING COMBI BOILERS
INSTALLATION & SERVICE MANUAL
EWA 2525C 25 kW
EWA 2530C 30 kW

3
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The Benchmark Scheme
Warmhaus is a licensed member of the Benchmark Scheme which aims to improve the standards
of installation and commissioning of domestic heating and hot water systems in the UK and to
encourage regular servicing to optimise safety, eciency and performance.
Benchmark is managed and promoted by the Heating and Hotwater Industry Council.
For more information visit www.centralheating.co.uk
Please ensure that the installer has fully completed the Benchmark Checklist in the use and
maintenance section of the installation instructions supplied with the product and that you have
signed it to say that you have received a full and clear explanation of its operation.
The installer is legally required to complete a commissioning checklist as a means of complying
with the appropriate Building Regulations (England and Wales).
All installations must be notified to Local Area Building Control either directly or through a
Competent Persons Scheme.
A Building Regulations Compliance Certificate will then be issued to the customer who should, on
receipt, write the Notification Number on the Benchmark Checklist.
This product should be serviced regularly to optimise its safety, eciency and performance.
The service engineer should complete the relevant Service Record on the Benchmark Checklist
after each service.
The Benchmark Checklist may be required in the event of any warranty work and as supporting
documentation relating to home improvements in the optional documents section of the Home
Information Pack

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CONTENTS
1. INTRODUCTION ...................................................................................................6
1.1. Boiler Description ................................................................................... 6
1.2. Safety Instructions:................................................................................. 6
1.3. Technical Specification.......................................................................... 8
1.4. Product Identification............................................................................ 9
1.5. Regulations ............................................................................................. 9
2. PRE-INSTALLATION..........................................................................10
2.1. Packing Contents.................................................................................. 10
2.2. Appliance Overview ............................................................................. 10
2.3. Location of Boiler / Clearance.............................................................11
2.4. System Requirements ...........................................................................12
2.4.1. General.............................................................................................................................. 12
2.5. Water Supply (only for Combi Boiler) ..............................................12
2.6. Gas Supply...............................................................................................12
2.6.1. By-pass ............................................................................................................................. 12
2.6.2. Ventilation........................................................................................................................ 12
2.6.3. Primary system cleaning ............................................................................................. 12
2.7. Electric Supply .......................................................................................12
2.8. PRV Discharge ........................................................................................12
2.9. Flue Terminal Position ..........................................................................13
3. INSTALLATION .................................................................................14
3.1. Unpacking Appliance........................................................................... 14
3.2. Appliance Position................................................................................ 14
3.3. Wall Mounting Template ..................................................................... 14
3.4. Preparing the Wall – Drill Flue Hole ................................................. 14
3.5. Installing Mounting Bracket................................................................ 14
3.6. Hanging The Boiler............................................................................... 14
3.7. Appliance Connections ........................................................................15
3.8. Filling Appliance & Adding Inhibitor ................................................16
3.9. Installation with Horizontal Flue Sets...............................................17
3.10. Installing the Flue System....................................................................18
3.11. Installation with Vertical Flue Sets (Ø60/100 mm)..................... 20
3.12. Concentric Flue Kits For Condensing Boilers (Ø60/100 mm)
...22
3.13. Plume Displacement Kits Ø60 mm...................................................23
3.14. Recommendations of Plume Kit Installation..................................23
3.15. Condensate Connection......................................................................24
3.16. Ewa Combi Boiler Wiring Diagram...................................................28
3.16.1. External Control Connection / Low Voltage Installation .................................. 29
3.16.2. External Control Connection / High Voltage (240 V) Installation................. 29
3.16.3. External Control Connection / SPlan Wiring Diagram ......................................30
3.16.4. External Control Connection / YPlan Wiring Diagram....................................... 31
4. COMMISSIONING.............................................................................. 32
4.1. Display Function ...................................................................................32
4.1.1. SET Transparent Parameters Menu (TSP) ............................................................. 32
4.1.2. Parameters...................................................................................................................... 33
4.1.3. Parameter Information................................................................................................ 38
4.2. Service Mode .........................................................................................38
4.3. CO/CO2 Combustion Check...............................................................39
4.4. Calibration ............................................................................................. 40
4.4.1. Auto Calibration............................................................................................................40
4.4.2. Auto Calibration............................................................................................................. 41
4.4.3. FTF Function.................................................................................................................. 42
4.4.4. ESF (Easy Start up Function)....................................................................................43
4.5. Information Menu Access....................................................................45
4.6. Deaeration Mode.................................................................................. 46
4.7. Ewa Combi Boiler Wall-Hung Boilers DHW Preheat Mode.........47
4.8. Pre-Commissioning Checklist ............................................................48
4.9. Checking Inlet Gas Pressure...............................................................48
4.10. Testing For Gas Leaks During Use....................................................48
4.11. Check Gas Rate .....................................................................................48
4.12. Circulation Pump Rotation .................................................................49
4.13. Setting Up the External Controls ......................................................49
4.14. Gas conversion from NG (G20) to LPG (G31) ............................... 50
4.15. Gas conversion from LPG (G31) to NG (G20) .................................51
5. SERVICING & PART REPLACEMENT ............................................ 52
5.1. Replacement of Components - First Stage ....................................52
5.2. Replacement of Components - Final Stage ...................................52
5.3. Draining The Boiler / CH Circuit........................................................52
5.4. Draining The Boiler / DHW Circuit (only for combi boilers) ...... 52
5.5. Flue Thermistor Replacement............................................................53
5.6. Ignition Electrode Replacement .......................................................53
5.7. Nozzle Replacement ............................................................................53
5.8. FLOW & RETURN TEMPERATURE SENSOR Replacement ........54
5.9. Interface PCB Replacement ..............................................................54
5.10. Main PCB Replacement .......................................................................54
5.11. 3-Way Inner Kit Replacement - TOP ................................................54
5.12. Pump Head Replacement ...................................................................54
5.13. Outlet Manifold Replacement............................................................55
5.14. Water Pressure Sensor Replacement...............................................55
5.15. 3 Bar Safety Valve Replacement.......................................................55
5.16. DHW Flow Sensor Replacement (for combi boilers only)..........55
5.17. DHW Plate Heat Exchanger Replacement
(for combi boilers only) .....................................................................55
5.18. Electrode Positioning For 25, 30 kW & Single Elektrode ...........56
6. FAULT FINDING & SOLUTIONS ...................................................... 58

6warmhaus.co.uk
1.1. Boiler Description
The Ewa combination boiler is a high-performance wall mounted energy
The latest Electronic Gas Adaptive System and Full Premix feature detects
the gas quality instantaneously and keeps the combustion quality constant.
(*) Please see ErP Data Table.
DANGER
This safety warning indicates that severe and life-threatening
personal injury will occur.
WARNING
This safety warning indicates that severe and life-threatening
personal injury may occur.
ATTENTION
This safety warning indicates that moderate personal injury may
occur.
RISK OF ELECTRIC SHOCK
This safety warning indicates “DANGER Risk of Electric
Shock”.
CAUTION
This icon indicates that damage could occur to products and
materials.
INFORMATION
This image indicates information you should read and adhere to
for the correct installation of our appliances.
Abbreviations:
PRV Pressure Relief Valve
NG Natural Gas
LPG Liquid Propane Gas
kW Kilowatts
CH Central Heating
DHW Domestic Hot Water
LHS Left Hand Side
RHS Right Hand Side
Mbar Millibar
ECV Emergency Control Valve
LCD Liquid Crystal Display
FGA Flue Gas Analyser
LDF Leak Detection Fluid
1.2. Safety Instructions:
ATTENTION
Please read these instructions fully before installing the appliance:
• These instructions are specific to the model illustrated on the front
cover and detailed in the technical data section of this manual and must
not be used for any other Warmhaus models.
• This appliance must only be installed by a competent Gas Safe registered
engineer and if in Ireland an RGI (Registered Gas Installer) and failure to
adhere to this could lead to prosecution.
• These installation instructions only apply to GB and IE and must be
adhered to with the exception of all statutory regulations.
• These appliances are CE certified for safety and performance and
therefore must in no way be altered or have any device or controls fitted
unless it is approved in this document or in writing from Warmhaus.
• The intended use for this appliance is to heat water and supply DHW in
domestic premises.
• Always refer to the appliance data badge for correct specifications and
ensure the boiler is operating within the safety settings outlined by
Warmhaus.
• Do not modify our flue system, and always use only the Warmhaus
approved flue with this appliance.
• Ensure Warmhaus original flue components including seals and gaskets
are used for the installation of this appliance.
• The installation of the appliance and controls must be done in
accordance to the current Gas Safety (Installation and Use) Regulations.
If you smell gas:
• Do not create flames or sparks, do not operate electric switches or
unplug any appliances.
• Do not use telephones or operate any doorbells.
•
control valve.
• Open doors and windows in the property and advise any neigh boring
properties to adhere to 1,2 and 4.
• Call the National Gas Emergency Service – 0800111999, or in Ireland
1850 20 50 50.
• Prevent people from entering the property.
• For LPG contact the number for the supplier given on the side of the gas
tank.
If you see any damage to the boiler flue or have a carbon monoxide
detector and the warning noise sounds:
•
• Open doors and windows.
• Leave the property and prevent anybody entering.
• Contact either your installer or the Emergency Gas Supplier – 080011199,
or in Ireland 1850 20 50 50.
• Do not use until the issue is identified and the appropriate rectifications
have been carried out.
Electrical work must be carried out by a qualified electrician and in
accordance to all I.E.E and current statutory regulations.
When maintaining a Warmhaus boiler you must only use original and
approved Warmhaus spare parts.
1. INTRODUCTION

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ATTENTION
• Do not store any combustible materials within the immediate vicinity
of the appliance or any corrosive chemicals that can damage the
appliance.
• Always follow the current Health & Safety guidance and advice for
manual handling when lifting the appliance.
• When lifting the appliance always use the appropriate PPE as per the
current guidance in your or industry standard Health & Safety policy.
• Dispose of all the appliance packaging as per your local waste disposal
guidance and obligations.
• This appliance contains NO asbestos or any material that have
contravened the COSHH regulations.
• Take care when handling any sharp edges on the boiler and safety
gloves must be worn.
• Warmhaus boilers are equipped with a diagnostic capability by means
of displaying error codes if the boiler fails to operate correctly, if your
boiler displays an error code please refer to your user manual and
arrange professional assistance where advised.
• Before operating your Warmhaus boiler please read the instructions
supplied with the boiler.
• For installation of this appliance in Ireland the following regulations
must always be followed:
• ECTI - National rules for electrical installations
• Irish Standard IS 10101:2020.
• IS813-2017 - Domestic Gas Installations
Where no specific instructions are given in this technical manual reference
should be made to the relevant British Standard codes of practice:
BS7074:1
Code of practice for domestic and hot water supply
BS6891
Installation of low-pressure gas pipe work up to 28 mm (R1)
BS5546
Installation of gas hot water supplies for domestic purposes
EN12828
Central heating for domestic premises
BS5440:1
Flues and ventilation for gas appliances of rated heating not exceeding 70
kW (net): Flues
BS5440:2
Flues and ventilation for gas appliances of rated heating not exceeding 70
kW (net): Air Supply
BS7593
Treatment of water in domestic hot water central heating systems
BS6798
Installation of gas fired boilers of rated input up to 70 kW (net)
BS7671
IET Wiring Regulations
WARMHAUS A.Ş. reserves the right to make all kinds of technical and commercial amendments without giving
information and rejects all responsibilities depending on misspelling.
1015

8warmhaus.co.uk
1.3. Technical Specification
TECHNICAL SPECIFICATION Unit Ewa-2525C Ewa-2530C
GC Number
Maximum DHW Heat Input KW 25.8 31.5
Maximum CH Heat Input (net) KW 24.2 24.2
Minimum Heat Input (net) KW 3.5 3.5
Heating Circuit G20 G31 G20 G31
Maximum Heat Output (80/60 °C) Pn 23.7 23.7 23.7 23.7
Minimum Heat Output (80/60 °C) Pn 3 2.5 3 2.5
Maximum Heat Output (50/30 °C) Pnc 25 25 25 25
Pnc 3.6 2.9 3.6 2.9
Maximum Pressure bar 3 3
Minimum Pressure bar 0.5 0.5
Expansion Vessel Water Capacity Litres 8 8
Expansion Vessel Pre-Charge bar 1 1
Maximum Water Capacity in System Litres 125 125
CH Temperature Adjustment °C 25-80 25-80
DHW Circuit G20 G31 G20 G31
Domestic Hot Water flow rate ( T 35 °C) l/min 10.6 12.7
Maximum Water Pressure bar 10 10
Minimum Flow Rate for Boiler Activation Litres 1.5 1.5
DHW Temperature Adjustment °C 35-60 35-60
Combustion Specification G20 G31 G20 G31
2.38 / 2.56 0.92 / 0.99 2.38 / 3.18 0.92 / 1.15
Gas Rate – Min 0.37 0.11 0.37 0.11
% 8.7 - 9.2 10 - 10.5 8.7 - 9.2 10 - 10.5
C02 – Minimum Power (AUTO CALIBRATION ONLY) % 8.6 – 9.4 10 – 10.5 8.6 – 9.4 10 – 10.5
C02 – Ignition Power (AUTO CALIBRATION ONLY) % 8.8 – 9.3 10 – 10.5 8.8 – 9.3 10 – 10.5
Minimum inlet dynamic Gas Pressure mbar 14.00 37.00 14.00 37.00
Electrical Specification
Power Supply V 240 240
External Supply Fuse Rating amp 3 3
Internal Supply Fuse Rating amp 3.15 3.15
Electricity Consumption W 95 95
Index Protection IP IPX5D IPX5D
Electrical Power Supply Frequency Hz 50 50
General
Flow Connection mm 22 22
DHW Connection mm 15 15
Gas Connection mm 22 22
Cold Inlet Connection mm 15 15
Return Connection mm 22 22
Condensate Connection mm 21.5 21.5
PRV Connection – Copper mm 15 15
Dimensions (H x W x D) mm 725 x 420 x 288 725 x 420 x 288
Net Weight Kg 32.6 32.5
Packaged Weight Kg 33.8 34.7
Clearances Above Casing mm 200 200
Clearances Below Casing mm 300 300
Clearances Front - Operational mm 5 5
Clearances Front - Servicing mm 450 450
Clearances Right Hand Side mm 25 25
Clearances Left Hand Side mm 25 25
Sound Level db 52 52
NOx Classification Class 6 6

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1.4. Product Identification
Ewa 2525 C—GC 47-786-13 (01.01.2021)
Ewa 2530 C—GC 47-786-14 (01.01.2021)
1.5. Regulations
• Current Gas Safety (Installation and Use) Regulations
• Building Regulations
• IET Regulations
• Local Water By-laws
It is a legal requirement in Ireland that all gas appliances must be installed
by a competent registered gas engineer, such as Gas Safe and installed in
accordance with all current Gas Safety Regulations.
Failure to install this appliance correctly and safely could lead to prosecution.
This appliance must be installed in accordance with and comply fully to the
current Gas Safety Regulations, IET Regulations, Building Regulations and
local water By-laws.
Building Regulations Part L1A2013 – (new build dwellings)
If the installation of our boiler is in a new build property or in an existing
property and it is a first-time installation then the heating system must fully
conform to all current building regulations Part L1A.
This can be an exception for a single-story open plan dwelling where the
living area is more than 70% of the useable floor area, in this case this zone
can be controlled and treated as a single zone.
Individual TRVs can be used on the system also.
For dwellings with a floor area over 150 m , a separate time and temperature
control for each individual zone is required.
TRVs should also be installed in a minimum of sleeping areas and as best
practice on all radiators with the exception of the room or area where the
room thermostat is installed.
Building Regulations Part L1B 2010 – existing dwellings
Where an appliance replacement is to be installed onto an existing heating
system it is not mandatory to zone for an example the ground floor and
configuration that complies to the current Boiler Plus e.g. Smart stat, Boiler
Plus compliant room/programmable room stat.
TRVs should also be installed in a minimum of sleeping areas and as best
practice on all radiators with the exception of the room or area where the
room thermostat is installed.
Ewa
0020_00.W170505

10 warmhaus.co.uk
2. PRE-INSTALLATION
2.1. Packing Contents
The Warmhaus Boiler is supplied in a box which contains the materials
listed below:
2.2. Appliance Overview
4
6
3
8
9
10
12
1
2
5
7
11
13
14
16
18
20
21
22
25
19
23
15
24
17
27
26
29
28
1. Flue Outlet
2. Flue Condensation Pan
3. Condensation Water Discharge Hose
4. Main Heat Exchanger
5. Ignition Electrode
6. Air Gas Mixing Unit (AGM)
7. CH NTC Sensor
8. Condensation Water Discharge Hose
9. Radiator Outlet (Flow) Pipe
10. Three Way Motorized Valve
11. Condensation Water Trap (Siphon)
12. Low Pressure Switch
13. Condensate Discharge Hose
14. Expansion Tank Air Valve
15. Flue Gas NTC Sensor
16. Expansion Vessel
17. Radiator Inlet (Return) Pipe
18. Gas Inlet Pipe
19. CH Return NTC Sensor
20. Pump
21. DHW Plate Heat Exchanger
22. 3 Bar Safety Valve
23. Manometer
24. Tap Water Flow Sensor
25. Gas Valve
26. Heat Exchanger Door
27. Fan
28. Automatic Air Relief Valve
29. Control Panel
I. Installation Scheme (Figure 2.1)
II. User’s Guide (Figure 2.2)
IV. Hanger Plate (Figure 2.3)
V. Mounting Pipe Kit (Figure 2.4)
Hanger plate
Do not leave packing materials (plastic, nylon, bags, etc.) at places to be reached by children for
preventing any dangers for suocation.
471 mm
1000 mm
110 mm
110 mm
GAS
G3/4" G3/4"G3/4"
80 mm 65 mm 65 mm 64 mm
725 mm 592 mm
94 mm
422 mm
G1/2"G1/2"
75 mm 73 mm
120 mm
150.11.014.000002.A
150.11.014.000001
150.11.014.000001.G
150.11.014.000002.G
150.11.606.000078
可
Opcjonalny
Választható
یرایتخا
0021_03.W170525
0025_00.WUK210331
0024_00.W160714
0022_00.W170929

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2.3. Location of Boiler / Clearance
CAUTION
The boiler must be installed on a flat fixed surface which is suitable to
support the weight of the boiler and any ancillaries that maybe required
for the Installation.
Service and maintenance should also be considered when choosing the
location of the boiler unit.
The boiler must not be installed outside
Please follow the below installation points.
• Frost protection: Our boiler has a built in frost protection for the system
water contained within the boiler only, so provisions need to be installed
to protect the system pipe work in unheated areas.
• Accessible: The boiler must be installed in a well lit location that is
suitable for engineers to carry out maintenance on the appliance and for
the customer to safely adjust any controls on the boiler. All roof space
installations should comply to BS5410 part 1 – roof space installations.
• Storage: Do not store any flammable materials around the location of
the boiler or chemicals of any kind.
Installations in rooms containing baths or showers
Warmhaus Ewa Combi Boiler has an IPX5D rating
Any switch or appliance external controls using mains electricity should not
be in reach of any person using a bath or shower.
All installations must be in accordance with all the current regulations and
latest amendments of the IET wiring regulations (BS7671) or in Ireland
Irish Standard IS 10101:2020
Boiler Height : 725 mm Boiler Width: 420 mm
Boiler Depth : 288 mm
Flue Centre: 208 mm (from left side of boiler to flue center)
min.
30
mm
min.
30
mm
550 mm
422 mm
min.
100
mm
min.
50
mm
727 mm 169 mm
286 mm
Clearances:
Above : 219 mm Below : 300 mm
Left : 30 mm Right : 30 mm
288 30
118
725 725
208
208
118
420
A B CD E
0026_00.W210116
0027_00.W210419

12 warmhaus.co.uk
2.4. System Requirements
INFORMATION
The installation of this appliance must take into consideration all prevailing
regulations and codes of practice and the data in this manual.
This instruction manual and the below standards must be adhered to
throughout the installation
Building Regulations.
British Standards.
Irish Standards
Gas Safety Regulations.
Water Supply Regulations,
2.4.1. General
INFORMATION
The system must be to a minimum standard that meets all relevant criteria
and regulations at the time of the installation of this appliance.
All external components must be able to withstand a working pressure of 3
bar and a working flow temperature of 100 °C.
The system must be free of any leaks and in a suitable working condition
for the connection of a new appliance.
2.5. Water Supply (only for Combi Boiler)
INFORMATION
Appliance use in hard water areas:
In normal operating conditions there is no need to provide any water
treatment to prevent any limescale formation this is because the maximum
temperature of the DHW heat exchanger is monitored and limited by
electronic control.
In areas where the water exceeds 200 ppm it is advised that a scale
prevention should be installed, and you should contact your local water
authority for advice and guidance.
Installations that have non-return or backflow valves fitted on the cold
mains should have a mini expansion vessel fitted between the valve and
the appliance.
2.6. Gas Supply
INFORMATION
The gas installation should be in accordance with the relevant standards. In
GB this is BS 6891 (NG). In IE this is the current edition of IS 813 Domestic
Gas Installations.
The boiler must be installed on a supply from a governed gas meter.
The connection to the appliance is a 22mm copper tail located at the rear
of the gas service cock.
Ensure that the pipework from the meter to the appliance is of adequate
size, and the demands of any other gas appliances in the property are
taken into consideration. Do not use pipes of a smaller diameter than the
boiler gas connection (22mm) UNLESS the stated gas rate can be achieved
with pipe of lesser diameter and with all other gas appliances operating at
maximum rate.
Purging of any pipe work and the appliance must be carried out as outlined
in BS 6891.
2.6.1. By-pass
INFORMATION
The boiler incorporates a bypass by utilizing the primary circuit on the
DHW plate heat exchanger and uses this method as an integral bypass
system and therefore does not require as standard an external bypass fitted
to the system.
2.6.2. Ventilation
INFORMATION
The boiler does not require any additional ventilation and when installed in a
cupboard or compartment the boiler operates at an adequate temperature
without the requirement for additional ventilation. BS 5440: Part 2 refers
to this in detail.
2.6.3. Primary system cleaning
Debris in the existing heating system can cause damage to the boiler unit
correct cleaning has not been carried out.
2.7. Electric Supply
RISK OF ELECTRIC SHOCK
This appliance must be earthed.
This appliance must not be connected to a three-phase supply.
External wiring must be correctly earthed, polarised and in accordance with
relevant regulations/rules. In GB this is the current IEE Wiring Regulations.,
in IE this is Irish Standard IS 10101:2020
The mains supply is 230V ~ 50Hz fused at 3A.
Important:
The method of connection to the electricity supply must facilitate complete
electrical isolation of the appliance.
Connection may be via a fused double-pole isolator with a contact
separation of at least 3mm in all poles and servicing the boiler and system
controls only, alternatively the connection can be made via a fused 3 pin
plug to an un-switched shuttered socket both complying to BS1363
When working on the boiler the electricity must always be isolated and the
correct method of safe isolation must always be followed.
Any external controls connected to the boiler must have at minimum and
valid CE approval and be suitable for connection to the boiler.
Please ensure the correct RCD is fitted the circuit where the boiler is
connected electrically, due to the low energy DC modulating pump fitted
inside the boiler.
If you plan to replace the cable supplied with the boiler for the electrical
connection, please ensure the replacement cable meets the current
standard and it is the correct size and has the correct heat rating.
2.8. PRV Discharge
ATTENTION
The safety discharge pipe must be installed with a minimum pipe size
diameter of 15mm and be in copper or an other suitable material that can
withstand PRV discharge temperatures and pressures that comply with BS
5254 or BS EN 1451.
The PRV discharge terminal must terminate away from any electrical
hazards and terminate where it cannot cause injury to person, it should
terminate with a bend to face the external surface or into a suitable drain
point.
The PRV discharge can be installed into a waste pipe system and all
installations should follow the guidance of BS 6798 sections 6.
Due to maintenance of the PRV we require our copper connection pipe to
be connected to the external PRV pipe work by means of a compression
joint so that in all installations maintenance will be achievable without the
need to cut and re-join copper pipe work.
Where PRV terminations are not possible to visually see e.g. directly into
a waste pipe connection, then a tundish must be fitted so that and water
drips leaking from the PRV can be visually seen and the appropriate action
taken.
Care should also be taken when planning the termination of the PRV due
to the possibility of a slow and steady drip can discharge from the terminal
and if not correctly sited leave the possibility of water freezing when hitting
ground causing an extreme hazard if the frozen water is in the path of a
walk way.

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A 300
B 300
C 300
D25 (75) mm
EBelow Eaves 25 (200) mm
FBelow balcony orcar port roof 25 (300) mm
G25 (150) mm
H25 (300) mm
I Above ground, roof or balcony level 300
J 600
K 1200
L 1200
M 1500
N 300
O50 mm
P From a structure on the roof N/A
Q 300
2.9. Flue Terminal Position
H
H
N
M
K
Q
QD,E
A
B
C
L
F
J
P
G
I
I
Q
O
Boundary
Boundary
600 mm
2000 mm
600 mm
600 mm
The flue should not
penetrate the shaded area
0028_03.W210507
0029_03.W210402
(1) Only
MUST be

14 warmhaus.co.uk
3. INSTALLATION
3.1. Unpacking Appliance
ATTENTION
Our appliance may require 2 people when lifting the boiler to the installation
site and throughout the installation process when lifting and positioning is
carried out.
Installers should be knowledgeable in safe handling techniques and pay
attention and follow all Health & Safety policies put in place by their
company.
Carefully unpack the boiler unit from it’s box and remove the unit from the
polystyrene packaging and dispose of the boiler packaging to comply with
your local waste management guidance.
3.2. Appliance Position
ATTENTION
The surface where the boiler is to be mounted must be flat and rigid and be
able to withstand the appliance total installation weight.
Care should be taken on the appliance position and location to ensure the
correct standards are met for the following:
• Flue terminal position and access to flue joints.
• Condensate discharge.
• PRV discharge and termination.
A visual inspection should be carried out to ensure when positioning the
appliance any drilling of the mounting bracket or pipe clips will damage
any electric cables or pipes.
3.3. Wall Mounting Template
Please ensure you mount the template level before drilling any holes and
ensure you are drilling the correct holes as per the template guidance.
The wall mounting template should be fixed to the desired position on the
surface where the boiler is to be installed, after fixing the template please
set the flue guide on the template to match your desired flue position.
Drilling of the fixing holes for the mounting bracket can also be done as per
the guidance on the wall mounting template.
The template also displays
the pipe centers and
correct pipe work layout
for the correct installation
of the boiler pipe work.
3.4. Preparing the Wall – Drill Flue Hole
ATTENTION
When drilling the flue hole ensure that any falling masonry debris will not
cause an injury to person or damage to property, please make sure both
surfaces when drilled are flat and free of debris.
We recommend using a 117 mm core drill attachment to drill the flue hole,
this will give you some tolerance if required when positioning the flue.
3.5. Installing Mounting Bracket
INFORMATION
We suggest when drilling the holes for the mounting brackets you drill
holes that can accommodate 7.5 mm / 8 mm plastic raw plugs and that the
minimum fixing screws are No 10 x 50mm and ensure when the mounting
bracket is fixed it is level.
Ensure you make a minimum of 2 fixing points to be drilled to ensure
correct fixing of our mounting bracket.
Please ensure the mounting bracket is fixed in the correct orientation with
the two hanging points facing in an upwards direction.
3.6. Hanging The Boiler
INFORMATION
Ensure that all the plastic safety plugs are removed from the CH and DHW
(for combi boilers only) inlet and outlet connections at the bottom of the
boiler.
Note that the boiler may contain some residual water when the plugs are
removed so care should be taken for this.
Taking all lifting techniques into consideration lift the boiler and locate it
over the two fixing tabs at either side of the mounting bracket.
Make sure the boiler is
correctly located on the
mounting bracket and
that the boiler is level and
straight.
471 mm
1000 mm
110 mm
110 mm
GAS
G3/4" G3/4"G3/4"
80 mm 65 mm 65 mm 64 mm
725 mm 592 mm
94 mm
422 mm
G1/2"G1/2"
75 mm 73 mm
120 mm
150.11.014.000002.A
150.11.014.000001
150.11.014.000001.G
150.11.014.000002.G
150.11.606.000078
可
Opcjonalny
Választható
یرایتخا
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3.7. Appliance Connections
The Warmhaus Ewa boiler is supplied with a hardware pack containing
isolation valves and a DHW connector pipe for the installer to connect to
the boiler unit.
The hardware pack supplied is:
PRV – 15 mm copper stub pipe – THIS CONNECTION SHOULD BE MADE BY
A SUITABLE COMPRESSION TYPE FITTING.
The condense connection is made
with a flexible hose supplied with the
boiler as per the above image
1. Central Heating Return (CH-3/4” thread)
2. Domestic Hot Water Inlet (DHW-1/2” thread)
3. Domestic Hot Water Outlet (DHW-1/2” thread)
4. Central Heating Flow (CH-3/4” thread)
5. Drain Point
6. Manometer
7. Pressure Relief Valve Outlet
8. Gas Inlet
9. Condansate Drain (Ø24 mm)
1. (A) CH Flow Valve (Red) 1 pcs.
2. (B) DHW Outlet Elbow 1 pcs.
3. (C) Gas Inlet Valve (Yellow) 1 pcs.
4. (D) DHW Inlet Valve (Blue) 1 pcs.
5. (E) CH Return Valve (Blue) 1 psc.
6. Gasket 3/4 " 3 pcs.
7. Gasket 1/2 " 2 pcs.
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16 warmhaus.co.uk
3.8. Filling Appliance & Adding Inhibitor
Fıllıng Loop Connectıon
When filling there may be a slight water leak from the air vent therefore
electrical connections should be protected.
ATTENTION
Do not adjust the system pressure if the boiler unit is hot, we suggest that
the boiler temperature is shown as below 40 degree's on the boiler display
screen before adjusting the pressure.
Ensure the system has been cleaned following the guidance of BS 7593 and
that all existing and installation debris is removed.
The primary heating circuit must not be filled with artificially or salt based
softened water it must be filled with an untreated cold supply from the
cold water main.
The filling loop must be WRAS approved and not be a permanent
installation (see below image)
If there is an additional expansion vessel fitted on the circuit, please ensure
the charge pressure is the same as the boiler vessel (0.75 bar).
If the filling loop is located away from the boiler then ensure a pressure
gauge is located next to the filling loop to ensure correct filling pressure.
The filling loop should always be removed, and suitable caps fitted to the
valves after filling the system has been carried out.
CH
RETURN
DHW
INLET
A
B
3/4 G"
1/2 G"
3/4 G"
1/2 G"
3/4 G"
CH FLOW
DHW OUTLET
GAS INLET
DHW INLET
CH RETURN
CH Return
Pipe Line
Check
Valve
Isolation
Valve
CH Return
Pipe Line
Closed Closed OpenOpen
Isolation
Valve Check
Valve
AB
A
B
FILLING LOOP CONNECTION TOP UP POSITION
AB
0
1.5 bar
ManometerManometer
I. FILLING LOOP WITH FLEXIBLE HOSE
0
CH
RETURN
DHW
INLET
A
B
CH Return
Pipe Line
Check
Valve
Isolation
Valve
CH Return
Pipe Line
Closed Closed OpenOpen
Isolation
Valve Check
Valve
AB
A
B
FILLING LOOP CONNECTION TOP UP POSITION
AB
0
1.5 bar
ManometerManometer
0
Filling Loop Connection
1. Remove the dust cap and connect to flexible hose to the check valve
securely.
2. Slowly turn the both valves to the Open position until the pressure
gauge reads between 1.2 and 1.5 bar.
3. Turn the both valves slowly to the Close position and check the pressure
in between 1.2 and 1.5 bar if pressure less than 1.2 bar then.
4. Slowly turn the both valves to the Open position until the pressure
gauge reads between 1.2 and 1.5 bar.
5. Turn the both valves slowly to the Close position and disconnected the
flexible hose from the check valve.
6. Fit the dust cap to the open and make sure no water leakage from valves
or caps.
NOTE: If loss of pressure problem persists you must contact your installer
or service company.
Adding Inhibitor
CAUTION
The inhibitor used in the system with your Warmhaus boiler must not cause
damage to any materials within the boiler e.g. stainless steel, copper, brass
and any other composite material.
If the boiler is installed in areas such as leisure accommodation, then the
inhibitor must incorporate an anti-freeze solution or the anti-freeze solution
can be added separately but must be suitable for the boiler materials as
above.
We advise that the PH level of the system water should be between 6 -8
and any chemicals added must not change this.
When the inhibitor is added please record this with a label (if the inhibitor
manufacturer supplied this) or with a suitable method so that the
installation date can be monitored for service.
Inhibitor levels should be monitored and checked on service/maintenance
visits to confirm the system has the correct dosage.
Always add the specified dosage given by the inhibitor manufacturer and
Caution should be taken when disposing of all containers from the inhibitor
after installation.
If there is any doubt on the suitability of the inhibitor you wish to use then
please consult Warmhaus technical before adding to the system.
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3.9. Installation with Horizontal Flue Sets
Connecting Horizontal Concentric Flue Set to the System Boiler, (original
diameter DN 60/100 mm)
Since your boiler is hermetic model, it takes air from exterior and discharges
exhaust gases created as the result of burning through the same flue
group. In order to prevent emission of excessively harmful exhaust gases,
flue usage and installation is very important, therefore warnings should be
taken into consideration when flue connections are being performed.
1. 90° Elbow
2. Ø100 Sealing Gasket
3. Ø60 Sealing Gasket
4. Centralizer
5. External Flue Pipe
6. Internal Wall Plate
7. External Wall Plate
8. Internal Flue Pipe
9. Grill
10. Neoprene Gasket
11. Screws
12. Inspection Cap (Fresh Air)
13. Inspection Cap (Gas)
1. 90° elbow
2. Inspection Cap (Gas)
3. Inspection Cap (Fresh Air)
4. Screws
5. Flange Gasket
6. Flange Gasket Screw
7. Neoprene Gasket
8. Ø100 Sealing Gasket
9. Ø60 Sealing Gasket
10. Centralizer
11. Internal Flue Pipe
12. Internal Flue Pipe
13. Internal Wall Plate
14. External Wall Plate
15. Grill
• Loosen the Flange Gasket Screw (6) and remove it from the elbow (1)
• Put the Neoprene Sealing Gasket (7) under the flange and secure it with
4 screws (6 and see Picture A)
• Place the flue elbow (90°) (1) press down and tighten the screw (6) to
secure the flue elbow (see picture B)
• Fit the outer and inner wall flanges (13-14) on the terminal pipe (12)
• Connect flue to the boiler, positioning the seals correctly (picture C).
Seal the flue into the wall with silicone or sand + cement and cover with
Wall Seals provided.
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18 warmhaus.co.uk
3.10. Installing the Flue System
Apply a suitable lubricant to the sealing joints before connecting any flue
products and ensure the horizontal flue terminal is installed level without a
slope.
The flue pipe must be sealed internally and externally with the wall seals
supplied.
Installation of
flue set pieces.
During installation please ensure that all flue extensions are
installed with a slope back to the boiler between 1.5 degree and
3 degrees. Also ensure the pipe is supported every 1 meter and
change in direction
60/100 mm Concentric flue systems information
Only approved Warmhaus flue systems can be connected to our appliance
and no other flues have been tested or approved to work with any
Warmhaus appliances – see below our list of standard products:
Concealed Flue Configurations
Where our Warmhaus flue system is to be installed in concealed locations
provisions must be made for inspection and service requirements.
• Minimum 300 mm square inspection hatches must be fitted.
• The inspection hatch edge must not be fitted more than 1.5 meters away
from a flue joint
• Inspection hatches should be fitted at every change of direction.
Flue Data
60/100mm Concentric flue systems information
Warmhaus flue pipe technical specification:
Horizontal Termination:
• Maximum length = 10 meters including the bend or adaptor connected
directly to the boiler.
• Additional horizontal flue pipes should always be installed with a 1.5° to
3° fall from the terminal to allow condensate to run back to the boiler
(1.5° = 25 mm per meter).
•
Elbow Equivalent To Straight Length
45 Degree 0.5 meter
90 Degree 1.0 meter
a c
1.5° - 3°
b
A
Flue Therminal
Wall Transition
Plate
Flue Therminal
Pipe
Wall
A
Warmhaus
horizontal
flue sets
do not require any
fall and must be
installed level.
Ensure the flue
extensions are
fitted with the
correct slope.
(Ø60/100 mm)
Lmax : Total Equivalent Length 10 m
Lmax : a (90° Bend) + b + c 10 m
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Total equivalent length 10 m
a (90° Elbow) + b + c (90° Elbow) + d 10 m
a- Standard Flue Set Elbow (90°)
b- Flue Extension Pipe
c- Additional 90° Elbow = 1 m
d- Standard Flue Set Pipe
Total equivalent length 10 m
a (90° Elbow) + b + c (45° Elbow) + d + e (45° Elbow) + f m01
Total length of hermetic flue set should not exceed 10 m with single elbow
horizontally. Also, this total length reduces by 1 m with every 90° elbows or
two 45° elbows. Maximum 3 pieces of 90° elbow can be used.
a- Standard Flue Set Elbow (90°)
b- Flue Extension Pipe (L1)
c- Additional 45° Elbow = 0,5 m
d- Standard Flue Set Pipe (L2)
e- Additional 45° Elbow = 0,5 m
f- Standard Flue Set Pipe (L3)
One 90° elbow and two 45° elbow
sample flue installations.
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20 warmhaus.co.uk
3.11. Installation with Vertical Flue Sets
(Ø60/100 mm)
Your Warmhaus boiler can also be installed with a vertical flue system that
can terminate on both flat and pitched roofs, vertical flue installations must
not exceed 11 m in total.
Apply a suitable lubricant to the sealing joints before connecting any flue
products and ensure the vertical flue terminal is installed level without a
slope.
The vertical flue terminal can be fitted to both flat and pitched surfaces.
Flue Data
WARNING
Warmhaus flue pipe technical specification:
Vertical Termination:
• Maximum length = 11 meters including the bend or adaptor connected
directly to the boiler.
•
Elbow Equivalent To Straight Length
45 Degree 0.5 meter
90 Degree 1.0 meter
Ø60/100mm, L max = 11m
A
INFORMATION: The vertical flue terminal can be fitted to both flat
and pitched surfaces.
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